How to Sharpen a Masonry Drill Bit

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Like other types of drill bits, a masonry bit wears over time, especially under heavy use. These bits are designed to drill through hard materials such as concrete or tile, which contribute to wear and tear on the bit. A grinder or a drill-sharpening machine help bring that worn bit back to its original usable condition.

The Grind

A bench grinder provides a high-speed means of sharpening masonry bits. Hold the bit at approximately a 60-degree angle so the bit's cutting edge is parallel to the grinding wheel. Hold the bit in a sharpening jig and wear heavy work gloves and eye protection. While the grinding wheel is in motion, press the bit against the wheel in short spurts of 30 seconds or so, cooling the bit in water to avoid overheating. Rotate the bit so the cutting edge becomes sharp all the way around; touch it with your finger to test for sharpness. Clean away loose bits of metal with a small file.

Machine Assist

Drill sharpeners designed for home use take a lot of the guesswork out of grinding. These are essentially small grinders with a built-in jig designed to sharpen common bit types and sizes. Instructions vary by brand and will be detailed in the sharpener's owner's manual.

About the Author

Kathy Adams is an award-winning journalist and freelance writer who traveled the world handling numerous duties for music artists. She writes travel and budgeting tips and destination guides for USA Today, Travelocity and ForRent, among others. She enjoys exploring foreign locales and hiking off the beaten path stateside, snapping pics of wildlife and nature instead of selfies.